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crypto: rsa-pkcs1pad - fix dst len 

The output buffer length has to be at least as big as the key_size.
It is then updated to the actual output size by the implementation.

Cc: <stable@vger.kernel.org>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tadeusz Struk 2016-04-06 14:42:32 -07:00 committed by Herbert Xu
parent 47cd30608f
commit 6f0904ada4
1 changed files with 6 additions and 6 deletions
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12
crypto/rsa-pkcs1pad.c
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@ -387,16 +387,16 @@ static int pkcs1pad_decrypt(struct akcipher_request *req)
req_ctx->child_req.src = req->src;
req_ctx->child_req.src_len = req->src_len;
req_ctx->child_req.dst = req_ctx->out_sg;
req_ctx->child_req.dst_len = ctx->key_size - 1;
req_ctx->child_req.dst_len = ctx->key_size ;
req_ctx->out_buf = kmalloc(ctx->key_size - 1,
req_ctx->out_buf = kmalloc(ctx->key_size,
(req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC);
if (!req_ctx->out_buf)
return -ENOMEM;
pkcs1pad_sg_set_buf(req_ctx->out_sg, req_ctx->out_buf,
ctx->key_size - 1, NULL);
ctx->key_size, NULL);
akcipher_request_set_tfm(&req_ctx->child_req, ctx->child);
akcipher_request_set_callback(&req_ctx->child_req, req->base.flags,
@ -595,16 +595,16 @@ static int pkcs1pad_verify(struct akcipher_request *req)
req_ctx->child_req.src = req->src;
req_ctx->child_req.src_len = req->src_len;
req_ctx->child_req.dst = req_ctx->out_sg;
req_ctx->child_req.dst_len = ctx->key_size - 1;
req_ctx->child_req.dst_len = ctx->key_size;
req_ctx->out_buf = kmalloc(ctx->key_size - 1,
req_ctx->out_buf = kmalloc(ctx->key_size,
(req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC);
if (!req_ctx->out_buf)
return -ENOMEM;
pkcs1pad_sg_set_buf(req_ctx->out_sg, req_ctx->out_buf,
ctx->key_size - 1, NULL);
ctx->key_size, NULL);
akcipher_request_set_tfm(&req_ctx->child_req, ctx->child);
akcipher_request_set_callback(&req_ctx->child_req, req->base.flags,